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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A257048 Numbers n for which the sum of their prime factors (with repetition) divides the Euler totient function.

Table of values

n a(n)
1 9
2 15
3 16
4 25
5 27
6 35
7 42
8 49
9 72
10 95
11 119
12 121
13 140
14 143
15 154
16 168
17 169
18 200
19 209
20 220
21 240
22 256
23 264
24 287
25 288
26 289
27 297
28 315
29 319
30 323
31 342
32 343
33 361
34 364
35 377
36 378
37 442
38 483
39 490
40 520
41 525
42 527
43 529
44 540
45 559
46 585
47 588
48 616
49 620
50 624
51 625
52 648
53 693
54 702
55 729

List of values

[9, 15, 16, 25, 27, 35, 42, 49, 72, 95, 119, 121, 140, 143, 154, 168, 169, 200, 209, 220, 240, 256, 264, 287, 288, 289, 297, 315, 319, 323, 342, 343, 361, 364, 377, 378, 442, 483, 490, 520, 525, 527, 529, 540, 559, 585, 588, 616, 620, 624, 625, 648, 693, 702, 729]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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